N, M = gets.split.map &:to_i
R = $<.map{|s| s.split.map &:to_i }

maximum = M.times.map{ [0, []]}
counts = [0] * N
ans = 0
R.each_with_index{|r, i|
  maximum = maximum.zip(r).map{|(max, idxs), x|
    case x <=> max
    when 1
      idxs.each{|j|
        counts[j] -= 1
        ans -= 1 if counts[j] < 1
      }
      counts[i] += 1
      ans += 1
      [x, [i]]
    when -1
      [max, idxs]
    else
      counts[i] += 1
      ans += 1
      [max, idxs + [i]]
    end
  }
  p ans
}